Add -I command line flag to enter interactive mode at startup

Avoids having to try to time a ^C after the signal handler is set up
but before any data is handled.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/scope.c b/scope.c
index 96f0464..89049aa 100644
--- a/scope.c
+++ b/scope.c
@@ -666,6 +666,7 @@ Usage(void)
             "              [-a<n>]  -- audio verbose output\n"
             "              [-q]  -- quiet output\n"
             "              [-D<debug-level>]\n"
+            "              [-I]  -- start in interactive mode\n"
             "              [-S<n>] -- start/stop on SIGUSR1\n"
             "              [-t]  -- terminate when all clients close\n");
     exit(1);
@@ -715,6 +716,10 @@ ScanArgs(int argc, char **argv)
                 debug(1, (stderr, "debuglevel = %d\n", debuglevel));
                 break;
 
+            case 'I':
+                Interrupt = 1;
+                break;
+
             case 'S':
                 HandleSIGUSR1 = 1;
                 ScopeEnabled = atoi(++*argv);